Unit cooler



March 6, 1934.

w. w. WILLIAMS 1,950,344

unn' COOLER Filed Feb. 15, 1953 I1 II. [I an u an A 11 an flHH/Z; 5? II'5 /0 I Q fill 6 /5 VW/IL TER w. WILL/4M5 Patented Mar. 6, 1934 UNITEDSTATES PATENT OFFICE 4 Claims.

This invention relates to improvements in unit coolers.

It is an object of this invention to provide a device of this characterwhich is compact in form and simple in operation and is adapted forinstallation in the room in which it is desired to cool and humidify ordehydrate the air therein, as the case may be.

With these and other objects in view, reference is made to theaccompanying sheet of drawing which illustrates a preferred form of thisinvention, with the understanding that minor detail changes may be madetherein without departing from the scope thereof.

In the drawing: I

Figure 1 is a view in rear ferred form of this device.

Figure 2 is a view in side elevation with parts broken away and partlyin section and diagrammatically illustrating its wiring to a humidifiercontrol.

In carrying out this invention, a rectangular frame 1 is provided with arear closure 2 having a circular opening 3 therein. A motor operated fan4 of the propeller type is mounted within the casing 1 preferably withthe motor M mounted on a bracket 5 exteriorly of the closure 2. Anevaporator of a refrigerating system preferably in the form of aplurality of parallel cooling pipes 6 connected to each other, as shownin Figure 1, having radiating fins thereon, mounted in a frame 7, issecured to the open or front side of the casing 1. The refrigerantenters through pipe &from the high side of the refrigerating unit, notshown, and passes through the expansion valve V, into the upper pipe 6,travels through said series of pipes and leaves the evaporator by pipe 9to the low side of the refrigerating unit.

A pan 10 open at the top is secured under the evaporator and a portionof the rectangular casing 1 and that portion of the casing 1 thereoveris cut away, as shown in Figure 2.

Upon operating the motor, the fan draws warm air through the opening 3and forces it over the pipes of the evaporator'or cooling unit into theroom thereby reducing the temperature of the air and at the same timecondensing a certain amount of moisture from it which drops down fromthe pipes 6 of the cooling unit and is caught in the pan 10. At the sametime a certain amount of air from the fan passes downward through theopening 11 in the casing 1 and is caused to pass over the water ofcondensation collected in the pan 10 taking up a certain amountelevation of a preof moisture in its passage and the air so humidifiedis discharged through the opening 12 of the pan 10 in front of thecooling unit in the casing 7 and is diffused with the air having passedthrough the evaporator coil 6 and is can'ied 00 therewith.

An over-flow pipe 13 is provided in the pan 10 which passes through thebottom thereof and is connected to a pipe 14 leading to the sewer.

In order to vary the humidifying action of the N air current passingover the water of condensation in the pan 10, a valve or door 15 adaptedto close the entire opening-11 is pivoted at one side thereof and isprovided with an operating lever 16 having a lost motion connection witha core 10 17 of a solenoid S mounted at one side of the casing 7 asshown in Figure 2. In this device, as shown upon Figure 2, retraction ofthe core 17 within the solenoid S will swing the door 15 about its pivotto vary the amount of air from the fan deflector by the door throughopening 11 and over the water of condensate in the pan 10. It ispreferable to connect the solenoid S in series with a humidistat H to asource of electricity. Commercial humidistats are responsive so tohumidity changes in the surrounding atmosphere and are employed inpractice to open and close or vary a current of electricity to controlthe humidifying apparatus so that in this case the humidistat, when thesurrounding air reaches 35 a predetermined degree of moisture,saturation or humidity will either close or partially close the door 15through the solenoid S, as may be desired and when the humidity dropsbelow the predetermined degree, the humidistat will operate the solenoidto open or increase the opening of the door 15.

From the above description it is obvious that if it is desirable todehydrate the air in the room, the moisture in the air circulated by thefan 4 to pass through the cooler 6 will be condensed upon the coilsthereof and drop with the pan 10 so that if the door 15 remains in itsposition closing the opening 11 to the pan, no air current will passover the liquid in the pan, its level will rise, and the excess waterwill pass out through the overflow pipe 13. The condensed moisture isnot replaced in the cooled air but is withdrawn from the pan by theoverflow pipe.

What I claim is:

1. A unit air cooler and humidifier including a casing, a fan blowertherein, an air intake in the casing wall behind the fan, a cooling unithaving spaced apart members circulating a refrigerant secured to thecasing in front of the cas- 110 ing, an opening provided in the bottomof the casing adjacent the cooling unit, a pivoted closure for saidopening for deflecting a portion of the air from the fan through saidopening, an open pan secured to the underside of the casing communicating through said opening with the interior of the casing andextending beyond the front of the cooling unit, whereby warm air isdrawn into the casing by the fan and forced therefrom through thecooling unit and over the condensation caught in the pan and means torotate said closure to control the deflected air from the fan.

2. A unit air cooler and humidifier including a casing, a fan blowertherein, an air intake in the casing wall behind the fan, a cooling unithaving spaced apart members circulating a refrigerant secured to thecasing in front of the casing, an opening provided in the bottom of thecasing adjacent the cooling unit, a pivoted closure for said opening fordeflecting a portion of the air from the fan through said opening, anopen pan secured to the underside of the casing communicating throughsaid opening with the interior of the casing and extending beyond thefront of the cooling unit, whereby warm air is drawn into the casing bythe fan and forced therefrom through the cooling unit and over thecondensation caught in the pan, and electrically actuated means foroperating said closure.

3. A unit air cooler and humidifier including a casing, a fan blowertherein, an air intake in the casing wall behind the fan, a cooling unithaving spaced apart members circulating a refrigerant secured to thecasing in front of the casing, an opening provided in the bottom of thecasing the casing by the position adjacent the cooling unit, a pivotedclosure for said opening for deflecting a portion of the air from thefan through said opening, an open pan secured to the underside of thecasing communicating through said opening with the interior of thecasing and extending beyond the front of the cooling unit, whereby warmair is drawn into fan and forced therefrom through the cooling unit andover the condensation caught in the pan, electrically actuated means foroperating said closure, and a humidistat in circuit with said actuatingmeans to control the of the closure respons've to the humidity in thecooled air delivered by the fan.

4. A unit air cooler and humidifier including a casing, a fan blowertherein, an air intake in the casing wall behind the fan, a cooling unithaving spaced apart members, circulating a refrigerant secured to thecasing in front of the casing, an opening provided in the bottom of thecasing adjacent the cooling unit, a pivoted closure for said opening fordeflecting a portion of the air from the fan through said opening, anopen pan secured to the underside of the casing com municating throughsaid opening with the interior of the casing and extending beyond thefront of the cooling unit, whereby warm air is drawn into the casing bythe fan and forced therefrom through the cooling unit and over thecondensation caught in the pan, electrically actuated means foroperating said closure, and an overflow pipe in the pan to remove excesscondensation upon continued dehydration by main-- taining the casingopening to the pan closed.

WALTER w. WILLIAMS.

